CN208028089U - Doping and undoped complementary type white light organic electroluminescent device - Google Patents
Doping and undoped complementary type white light organic electroluminescent device Download PDFInfo
- Publication number
- CN208028089U CN208028089U CN201721874901.9U CN201721874901U CN208028089U CN 208028089 U CN208028089 U CN 208028089U CN 201721874901 U CN201721874901 U CN 201721874901U CN 208028089 U CN208028089 U CN 208028089U
- Authority
- CN
- China
- Prior art keywords
- layer
- doping
- undoped
- white light
- electroluminescent device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of doping and undoped complementary type white light organic electroluminescent device, including substrate, anode, cathode and the organic function layer between the anode and the cathode and charge generating layers；The organic function layer includes at least one layer of doping blu-ray layer and at least one layer of undoped complementary light luminescent layer, and the doping blu-ray layer is located at different luminescence units from undoped complementary light luminescent layer；Device shines, and high efficiency is high, luminescent spectrum is stable, simple in structure and preparation process is simple.
Description
Technical field
The utility model is related to organic semiconductor technologies fields, and in particular to a kind of doping has with undoped complementary type white light
Organic electroluminescence devices.
Background technology
OLED (full name in English is Organic Light Emitting Diodes, is looked like for organic electroluminescence device,
Abbreviation OLED) have from main light emission, visual angle is wide, light-weight, Acclimation temperature range is wide, area is big, all solidstate, flexibility, power consumption
The many merits such as low, fast response time and manufacturing cost are low have important application in display with lighting area, thus are learned
The extensive concern of art circle and industrial quarters.
In order to further increase efficiency and the service life of device, multiple independent luminescence units are stacked up, make by researcher
An equal amount of electric current successively flows through multiple and different luminescence units and carries out common shine to improve light emission luminance and efficiency, shape
Usually charge generating layers (charge generation layer, CGL) is used to be used as articulamentum by multiple hairs at tandem OLED
Light unit devices in series gets up compared with single-shot light unit device, and the current efficiency and light emission luminance of Tandem devices can
It being multiplied, and under same brightness, the current density of Tandem devices is relatively low, thus its service life also greatly increases .2005,
Ma Dongge of Changchun Institute of Applied Chemistry et al. reports series connection WOLED for the first time, and the structure of device is：ITO/NPB/DNA/BCP/Alq3/
BCP:Li/ V2O5/NPB/Alq3:DCJTB/Alq3/ LiF/Al (Appl.Phys.Lett.2005,87,173510.) wherein with
DNA/BCP/Alq3Blue light and green light, Alq are generated as the first luminescence unit3:DCJTB generates feux rouges as the second luminescence unit,
BCP:Li/V2O5Two holes luminescence unit are effectively connected as charge generating layers and electronics generates in charge generating layers,
Under electric field action, it is respectively transmitted to adjacent NPB and Alq3Layer in and they by compare the first luminescence unit indigo plant
Green device (2.2cdA-1,0.5lm· W-1,890cd·m-2) and the second luminescence unit red device (6cdA-1,
2.1lm·W-1,8300cd·m-2), it is found that the current efficiency of series connection WOLED and brightness are both greater than two single-shot light unit devices
Summation (maximal efficiency is up to 10.7cdA-1, maximum brightness 10200cdm-2), and power efficiency is then equal to two single-shots
Summation (the 2.6lmW of light unit device-1) simultaneously, Chang et al. is using optical absorptivity lower Mg: Alq3/WO3Make
For charge generating layers, two single white-light emitting units are connected, discovery is influenced by microcavity effect, the effect for the WOLED that connects
Rate (22cdA-1) it is three times of single-shot light unit device, and in 100 cdm-2Under brightness, the service life is more than 80000h
(Appl.Phys.Lett.2005,87,253501.) is nearest, and Son et al. synthesizes a kind of efficient blue phosphorescent master first
Body (TATA) can be obtained based on the luminous high efficiency blue OLED (46.2cdA of FIrpic-1,45.4lm·W-1), and will be efficient
Yellow light elementary layer (86.8cd A-1,90.5lm·W-1) pass through charge generating layers TmPyPB：Rb2CO3/ Al/HAT-CN is carried out
Connection devices open bright voltage (brightness 1cdm-2) down to 4.55V, maximum power efficiency 65.4lmW-1, maximum electricity
Stream efficiency is 129.5cdA-1Even if maximum external quantum efficiency is 49.5%. in 1000cdm-2Under brightness, the power of device
Efficiency is still up to 63.1lmW-1, current efficiency is up to 128.8cdA-1, external quantum efficiency is up to 49.2%, this is fully
Illustrate good prospect (J.Mater.Chem.C 2013,1,5008.) of tandem OLED
And white light Tandem devices in the prior art is complicated, and be almost required for applying to doping techniques progress
Prepare luminescent layer；In addition, seldom improving to blu-ray layer in Tandem white device.In view of the shortcomings of the prior art, providing a kind of
Novel, efficient, simple in structure, simple for process, spectrum-stable Tandem white organic electroluminescence device is existing to overcome
Technical deficiency is very necessary.
Utility model content
In view of this, the purpose of the utility model is to overcome defect in the prior art, doping and undoped complementation are provided
Type white light organic electroluminescent device, device shines, and high efficiency is high, luminescent spectrum is stable, simple in structure and preparation process is simple.
The doping of the utility model and undoped complementary type white light organic electroluminescent device, including including substrate, anode,
Cathode and the organic function layer between the anode and the cathode and charge generating layers；
The organic function layer includes that at least one layer adulterates blu-ray layer and at least one layer of undoped complementary light luminescent layer, described
Doping blu-ray layer is located at different luminescence units from undoped complementary light luminescent layer.
Further, the doped body of the doping blu-ray layer is bipolarity main body.
Further, the bipolarity main body is to be made of a kind of material or mixed by p-type main body and N-shaped main body.
Further, every layer of light emitting layer thickness inside the luminescence unit of the organic electroluminescence device is 0.01-
200nm。
Further, the thickness of the wall in the organic electroluminescence device is 0.01-30nm.
Further, the wall is prepared using undoped technology.
The utility model has the beneficial effects that：A kind of doping disclosed by the utility model is organic with undoped complementary type white light
Electroluminescent device, device shines, and high efficiency is high, luminescent spectrum is stable, simple in structure and preparation process is simple.
Description of the drawings
The utility model is further described with reference to the accompanying drawings and examples：
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2-Fig. 8 is the structural schematic diagram of other combinations of device in the utility model；
Fig. 9 is the luminous efficiency figure of device A in the utility model.
Specific implementation mode
Fig. 1 is the structural schematic diagram of the utility model, and Fig. 2-Fig. 8 is that the structure of other combinations of device in the utility model is shown
It is intended to, Fig. 9 is the luminous efficiency figure of device A in the utility model, as shown, the doping in the present embodiment and undoped complementation
Type white light organic electroluminescent device, including substrate, anode, cathode and organic work(between the anode and the cathode
Ergosphere and charge generating layers；
The organic function layer includes at least one layer of doping blu-ray layer and at least one layer of undoped complementary light luminescent layer, and is mixed
Miscellaneous blu-ray layer is located at different luminescence units from undoped complementary light luminescent layer；Certainly, device further includes that other are existing
Functional layer belongs to the prior art, and details are not described herein.
In the present embodiment, the doping blue light main body is preferably bipolarity main body, can effectively widen the generation area of exciton
Domain further enhances efficiency, stable color coordinate, service life and reduces efficiency roll-off phenomenon；Bipolarity main body refers to the material
Hole mobility is equal or approximate with electron mobility.
In the present embodiment, the bipolarity main body can be that a kind of material is constituted, can also be by p-type main body and N-shaped main body
It mixes；P-type main body refers to that the hole mobility of the material is more than electron mobility, and N-shaped main body refers to the hole of the material
Mobility is less than electron mobility
It,, can profit if two-layer luminescent layer main body is different at this time when the doping blu-ray layer is two layers in the present embodiment
With between two different subjects, there are energy levels to mismatch principle；The difference of the charge-transporting of two different subjects can also be utilized
Principle, naturally it is also possible to while utilizing two kinds of principles；The generating region that exciton can effectively be widened, further enhances efficiency, color
Coordinate stability, service life and reduction efficiency roll-off phenomenon；The energy level mismatch principle refer to two blue-light-emitting layer main bodies it
Between HOMO, at least a kind of difference between lumo energy causes charge to be accumulated in blue light interlayer；Charge described above
The different principle of transporting refers to that the polarity of main body material therefor in two blue blu-ray layers is different, be p-type material, n-type material with
And the arbitrary two kinds of combinations of combination of bipolar materials, but cannot be p-type and the combination of p-type or the combination of N-shaped and n types,
Otherwise it can not ensure that light emitting surface is located at blue-light-emitting interlayer.
In the present embodiment, when the doping blu-ray layer is two layers, if two-layer luminescent layer main body is identical and objective at this time at this time
Body is different, then can be using there are energy levels to mismatch principle between two different objects；Two different objects can also be utilized
The different principle of charge-transporting, naturally it is also possible to while utilizing two kinds of principles；The generating region that exciton can effectively be widened, into
One step enhances efficiency, stable color coordinate, service life and reduces efficiency roll-off phenomenon；Energy level described above mismatches principle
HOMO between two blue light-emitting layer objects, at least a kind of difference between lumo energy, causes charge to be accumulated in blu-ray layer
It is tired；The different principle of charge-transporting described above refers to that the polarity of object material therefor in two blue blu-ray layers is different, is p
The arbitrary two kinds of combinations of combination of proximate matter material, n-type material and bipolar materials, but cannot be the combination of p-type and p-type, or
Otherwise the combination of N-shaped and N-shaped can not ensure that light emitting surface is located at blue-light-emitting interlayer.
The undoped complementary light luminescent layer refers to the luminescent layer that white light can be obtained with blue light complementation, includes at least one kind
It is photochromic；
The position in the devices of the undoped complementary light luminescence unit and blue light emitting unit can be exchanged, and lead to
Optical effect is overregulated to obtain best device；
Luminescent layer in the undoped complementary light luminescence unit is made of non-doped layer, can be substantially reduced in this way
Device technology saves time and cost；
Every layer of light emitting layer thickness inside the luminescence unit can be 0.01-200nm；
In the present embodiment, every layer of light emitting layer thickness inside the luminescence unit is preferably 0.01-100nm；
Luminescent layer inside the undoped complementary light luminescent layer luminescence unit can be with direct neighbor, can not also be adjacent；
When in order to avoid excessive energy transfer or concentration quenching, then the luminescent layer inside the luminescence unit needs spacer layer separates
It comes；
The thickness of the wall can be 0.01-30nm；
In the present embodiment, the thickness of wall is preferably 0.1-10nm；
The wall is also prepared using undoped technology, and technique can be simplified；
The energy level of the wall will be matched with the direct energy level of luminescent layer, especially triplet otherwise be less than
The triplet 0.2eV of the luminescent layer contacted, avoids excessive exciton from being quenched, and influences the efficiency of device；
The charge generating layers connect N layers of undoped white-light emitting unit, and wherein N >=2, charge generating layers can have
Effect generates hole and electronics so that the efficiency of device greatly increases, and is conducive to the service life of device；
The charge generating layers connect luminescence unit, and the position of each luminescence unit can be adjusted as needed
It changes, without influencing the utility model.
In another embodiment, a kind of white light organic electroluminescent device of connecting of doping blu-ray layer and undoped complementary light
Structure for A, device A is：ITO/HAT-CN(100nm)/NPB(15nm)/TCTA(5nm)/TCTA： FIrpic(10nm,
8%)/TPBi：FIrpic (10nm, 8%)/TPBi (15nm)/Bepp2:KBH4(10nm, 15%)/HAT-CN (120nm)/NPB
(15nm)/TCTA(5nm)/Ir(dmppy)2(dpp)(0.9nm)/TmPyPB(50nm)/ Cs2CO3(1nm)/Al(200nm)。
The structure of device A is added by following functions stacking successively：
Substrate, anode, hole injection layer, hole transmission layer, blue phosphorescent layer, electron transfer layer, electron injecting layer, charge
Generation layer, hole transmission layer, yellow phosphorescence layer, electron transfer layer, electron injecting layer, cathode.
Aforesaid substrate is glass.
Above-mentioned anode is ito thin film.
Above-mentioned hole injection layer is the HAT-CN films of 100nm thickness.
Above-mentioned hole transmission layer includes the hole transmission layer 1 stacked gradually and hole transmission layer 2, the hole transmission layer 1
For the NPB films of 15nm thickness, the hole transmission layer 2 is the TCTA films of 5nm thickness.
Above-mentioned blue phosphorescent layer is the TCTA of 10nm：The TPBi of FIrpic and 10nm：FIrpic films.
Above-mentioned electron transfer layer is the TPBi films of 15nm thickness.
Above-mentioned electron transfer layer is the Bepp of 10nm thickness2:KBH4Film.
Above-mentioned charge generating layers are the NPB films of the HAT-CN and 15nm of 120nm thickness.
Above-mentioned hole transmission layer is the TCTA films of 5nm thickness.
Above-mentioned yellow phosphorescence layer is the Ir (dmppy) of 0.9nm thickness2(dpp) film.
Above-mentioned electron transfer layer is the TmPyPB films of 50nm thickness.
Above-mentioned electron injecting layer is the Cs of 1nm thickness2CO3Film.
Above-mentioned cathode is the Al films of 200nm thickness.
A kind of doping blu-ray layer and the undoped complementary light connect white light organic electroluminescent device A by the following method
It prepares：
1, ito thin film is prepared as anode using sputtering method on substrate.
2, the HAT-CN of 100nm is prepared as hole injection layer using vacuum deposition method on anode again.
3, the NPB films of 15nm thickness are prepared as hole transmission layer using vacuum deposition method on above-mentioned hole injection layer
1。
4, the TCTA films of 5nm thickness are prepared as hole transport using vacuum deposition method on above-mentioned hole injection layer 1
Layer 2.
5, the TCTA of 10nm is prepared with vacuum deposition method on above-mentioned hole injection layer 2：FIrpic's and 10nm
TPBi：FIrpic films are as blue phosphorescent layer.
6, the TPBi films of 15nm thickness are prepared as electron-transport using vacuum deposition method on above-mentioned blue phosphorescent layer
Layer.
7, the Bepp of 10nm thickness is prepared with vacuum deposition method on layer by layer in above-mentioned electron-transport2：KBH4 film conducts
Electron injecting layer.
8 prepare the NPB films of the HAT-CN and 15nm of 120nm thickness on above-mentioned electron injecting layer with vacuum deposition method
Thickness is used as charge generating layers.
9, the TCTA films of 5nm thickness are prepared as hole transport using vacuum deposition method on above-mentioned charge generating layers
Layer.
10, the Ir (dmppy) of 0.9nm thickness is prepared with vacuum deposition method on above-mentioned hole injection layer2(dpp) thin
Film is as yellow phosphorescence layer.
11, the TmPyPB films for preparing 50nm thickness using vacuum deposition method on above-mentioned yellow phosphorescence layer are passed as electronics
Defeated layer.
12, the Cs of 1nm is prepared with vacuum deposition method on above-mentioned electron transfer layer2CO3Film is as electron injecting layer.
13, the Al films of 200nm are prepared as cathode using vacuum deposition method on above-mentioned electron injecting layer.
The performance of the above-mentioned device A being prepared is detected, the efficiency chart of device A is as shown in Figure 9.Device A this
The maximal efficiency of outer device is 78cd/A.
Finally illustrate, above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be to this
The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model
It encloses, should all cover in the right of the utility model.
Claims (6)
1. a kind of doping and undoped complementary type white light organic electroluminescent device, it is characterised in that：Including substrate, anode, the moon
Pole and the organic function layer between the anode and the cathode and charge generating layers；
The organic function layer includes at least one layer of doping blu-ray layer and at least one layer of undoped complementary light luminescent layer, the doping
Blu-ray layer is located at different luminescence units from undoped complementary light luminescent layer.
2. doping according to claim 1 and undoped complementary type white light organic electroluminescent device, it is characterised in that：Institute
The doped body for stating doping blu-ray layer is bipolarity main body.
3. doping according to claim 2 and undoped complementary type white light organic electroluminescent device, it is characterised in that：Institute
It is to be made of a kind of material or mixed by p-type main body and N-shaped main body to state bipolarity main body.
4. doping according to claim 3 and undoped complementary type white light organic electroluminescent device, it is characterised in that：Institute
It is 0.01-200nm to state every layer of light emitting layer thickness inside the luminescence unit of organic electroluminescence device.
5. doping according to claim 4 and undoped complementary type white light organic electroluminescent device, it is characterised in that：Institute
The thickness for stating the wall in organic electroluminescence device is 0.01-30nm.
6. doping according to claim 5 and undoped complementary type white light organic electroluminescent device, it is characterised in that：Institute
Wall is stated to be prepared using undoped technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721874901.9U CN208028089U (en) | 2017-12-27 | 2017-12-27 | Doping and undoped complementary type white light organic electroluminescent device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721874901.9U CN208028089U (en) | 2017-12-27 | 2017-12-27 | Doping and undoped complementary type white light organic electroluminescent device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208028089U true CN208028089U (en) | 2018-10-30 |
Family
ID=63900905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721874901.9U Active CN208028089U (en) | 2017-12-27 | 2017-12-27 | Doping and undoped complementary type white light organic electroluminescent device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208028089U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108198949A (en) * | 2017-12-27 | 2018-06-22 | 重庆赛宝工业技术研究院 | Doping and undoped complementary type white light organic electroluminescent device and preparation method thereof |
-
2017
- 2017-12-27 CN CN201721874901.9U patent/CN208028089U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108198949A (en) * | 2017-12-27 | 2018-06-22 | 重庆赛宝工业技术研究院 | Doping and undoped complementary type white light organic electroluminescent device and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Nowatari et al. | 60.2: Intermediate Connector With Suppressed Voltage Loss for White Tandem OLEDS | |
| CN101447555B (en) | Laminated organic electro-luminescent device of an organic semiconductor-based hetero-junction electric-charge generating layer taken as a connecting layer and preparation method thereof | |
| TW201843857A (en) | Organic electroluminescent device capable of significantly improving the luminous efficiency of a fluorescent OLED device, and having advantages of low open-circuit voltage, low roll-off, and the like | |
| CN102074658B (en) | Electric charge production layer, lamination layer organic light-emitting diode and preparation method thereof | |
| CN102779948B (en) | White color organic electroluminescence device and manufacture method thereof | |
| CN103219471A (en) | Top-emitting organic electroluminescent device based on semi-transparent composite negative electrode and preparation method for top-emitting organic electroluminescent device | |
| CN108281559A (en) | A kind of high efficiency, the low phosphorescence Organic Light Emitting Diode that roll-offs | |
| CN108269937A (en) | A kind of hydridization white light organic electroluminescent device of efficient high color rendering index (CRI) | |
| CN107123749A (en) | A kind of high color rendering index (CRI) white light organic electroluminescent device and preparation method thereof | |
| CN107591491A (en) | A kind of undoped white-light emitting layer series connection organic electroluminescence device and preparation method thereof | |
| CN107507922A (en) | One kind series connection organic electroluminescence device | |
| CN109755398A (en) | A kind of efficient hydridization white light organic electroluminescent device and preparation method thereof with high color rendering index (CRI) | |
| CN108807710A (en) | Undoped organic electroluminescence device and the preparation method of connecting with the complementary white light of doping | |
| US20220278293A1 (en) | Organic electroluminescent device and array substrate | |
| CN107546248A (en) | A kind of undoped white-light emitting layer series connection organic electroluminescence device | |
| CN107302058A (en) | A kind of undoped white-light emitting layer series connection organic electroluminescence device | |
| Ying et al. | High efficiency doping-free warm-white organic light-emitting diodes with strategic-tuning of radiative excitons by combining interfacial exciplex with multi-ultrathin emissive layers | |
| CN208028089U (en) | Doping and undoped complementary type white light organic electroluminescent device | |
| CN108682748A (en) | A kind of series connection white light organic electroluminescent device | |
| CN108807706A (en) | A kind of white light series connection organic electroluminescence device | |
| CN108288678B (en) | Double blue light layer hybridization white light organic electroluminescent device | |
| CN108321302B (en) | Efficient and stable hybrid white light organic electroluminescent device | |
| CN208655702U (en) | Undoped white light series connection organic electroluminescence device complementary with doping | |
| CN108198949A (en) | Doping and undoped complementary type white light organic electroluminescent device and preparation method thereof | |
| Xue et al. | Bipolar TADF interlayer for high performance hybrid WOLEDs with an ultrathin non-doped emissive layer architecture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 401332 No.3, Xiyuan South Street, Xiyong weidian Park, Shapingba District, Chongqing Patentee after: Chongqing Saibao Industrial Technology Research Institute Co.,Ltd. Address before: 401332 No.3, Xiyuan South Street, Xiyong weidian Park, Shapingba District, Chongqing Patentee before: CHONGQING CEPREI INDUSTRIAL TECHNOLOGY Research Institute |
|
| CP01 | Change in the name or title of a patent holder |